Here is a scan of the  current  Bellagio Fountain Show song list and schedule as of March 10, 2025. The schedule was re-confirmed in August as well.
The regular performance schedule is:

• Monday-Friday – every half hour from 3pm until 8pm; every 15 minutes from 8pm until 11:55pm
• Saturday, Sunday  & Holidays  – every 30 minutes from 12pm until 8pm, every 15 minutes from 8pm until 11:55pm

I did a quick comparison to the March 2024 schedule. “Beautiful” and “Perfect” have replaced other songs. Otherwise the schedule is the same (which is typical).